TY  - JOUR
AU  - Brownwood, Bellamy
AU  - Turdziladze, Avtandil
AU  - Hohaus, Thorsten
AU  - Wu, Rongrong
AU  - Mentel, Thomas F.
AU  - Carlsson, Philip T. M.
AU  - Tsiligiannis, Epameinondas
AU  - Hallquist, Mattias
AU  - Andres, Stefanie
AU  - Hantschke, Luisa
AU  - Reimer, David
AU  - Rohrer, Franz
AU  - Tillmann, Ralf
AU  - Winter, Benjamin
AU  - Liebmann, Jonathan
AU  - Brown, Steven S.
AU  - Kiendler-Scharr, Astrid
AU  - Novelli, Anna
AU  - Fuchs, Hendrik
AU  - Fry, Juliane
TI  - Gas-Particle Partitioning and SOA Yields of Organonitrate Products from NO 3 -Initiated Oxidation of Isoprene under Varied Chemical Regimes
JO  - ACS earth and space chemistry
VL  - 5
IS  - 4
SN  - 2472-3452
CY  - Washington, DC
PB  - ACS Publications
M1  - FZJ-2021-02445
SP  - 785 - 800
PY  - 2021
AB  - Alkyl nitrate (AN) and secondary organic aerosol (SOA) from the reaction of nitrate radicals (NO3) with isoprene were observed in the Simulation of Atmospheric PHotochemistry In a large Reaction (SAPHIR) chamber during the NO3Isop campaign in August 2018. Based on 15 day-long experiments under various reaction conditions, we conclude that the reaction has a nominally unity molar AN yield (observed range 90 ± 40%) and an SOA mass yield of OA + organic nitrate aerosol of 13–15% (with ∼50 μg m–3 inorganic seed aerosol and 2–5 μg m–3 total organic aerosol). Isoprene (5–25 ppb) and oxidant (typically ∼100 ppb O3 and 5–25 ppb NO2) concentrations and aerosol composition (inorganic and organic coating) were varied while remaining close to ambient conditions, producing similar AN and SOA yields under all regimes. We observe the formation of dinitrates upon oxidation of the second double bond only once the isoprene precursor is fully consumed. We determine the bulk partitioning coefficient for ANs (Kp ∼ 10–3 m3 μg–1), indicating an average volatility corresponding to a C5 hydroxy hydroperoxy nitrate.
LB  - PUB:(DE-HGF)16
C6  - 33889791
UR  - <Go to ISI:>//WOS:000641221000004
DO  - DOI:10.1021/acsearthspacechem.0c00311
UR  - https://juser.fz-juelich.de/record/892946
ER  -